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Home >> Lexus >> 2007 >> GS 430 >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> Vehicle Stability Control System >> DTC C0210/33 Rear Speed Sensor RH Circuit; DTC C0215/34 Rear Speed Sensor LH Circuit; DTC C1273/73 Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274/74 Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the ABS and TRACTION actuator assembly, perform zero point calibration (see CALIBRATION ).

HINT:

Start the inspection from "CHECK HARNESS AND CONNECTOR" when using the intelligent tester and from "PERFORM TEST MODE" when not using the intelligent tester.

  1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) 
    1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to a DTC (see CHECK FOR INTERMITTENT PROBLEMS ).

    DATA LIST: ABS/VSC 

    NORMAL CONDITION CHART

    Item (Display) Measurement Item / Range (Display) Normal Condition
    RR SPD OPN RR speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption
    NORMAL: Normal
    RL SPD OPN RL speed sensor open detection / ERROR or NORMAL ERROR: Momentary interruption
    NORMAL: Normal

    OK: 

    There are no momentary interruptions. 

    HINT:

    Perform the above inspection before removing the sensor and connector.

    NG: CHECK AND REPAIR HARNESS AND CONNECTOR (SPEED SENSOR CIRCUIT) 

    OK: Go to next step 

  2. READ VALUE OF INTELLIGENT TESTER (REAR SPEED SENSOR) 
    1. Connect the intelligent tester to the DLC3.
    2. Start the engine.
    3. Select the DATA LIST mode on the intelligent tester.

      DATA LIST: ABS/VSC 

      NORMAL CONDITION CHART

      Item (Display) Measurement Item / Range (Display) Normal Condition
      RL WHEEL SPD Wheel speed sensor (RL) reading / min.: 0 mph (0 km/ h, max.: 202 mph (326 km/h)) Actual wheel speed
      RR WHEEL SPD Wheel speed sensor (RR) reading / min.: 0 mph (0 km/h, max.: 202 mph (326 km/h)) Actual wheel speed
    4. Check that no difference between the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.

      OK: 

      The speed value output from the speed sensor displayed on the intelligent tester is the same as the actual vehicle speed. 

      DATA LIST: ABS/VSC 

      NORMAL CONDITION CHART

      Item (Display) Measurement Item / Range (Display) Normal Condition
      RR WHEEL DIR Wheel direction (RR) / FORWARD or BACK FORWARD: Forward
      BACK: Back
      RL WHEEL DIR Wheel direction (RL) / FORWARD or BACK FORWARD: Forward
      BACK: Back
    5. Check that the sensor signal conforms to the wheel direction.

      OK: 

      The wheel direction is displayed. 

    NG:  Go to step  5

    OK: Go to next step 

  3. PERFORM TEST MODE (SIGNAL CHECK) 
    1. Perform sensor signal check in TEST MODE PROCEDURE (see TEST MODE PROCEDURE ).

      OK: 

      All test mode DTCs are erased. 

    NG:  Go to step  5

    OK: Go to next step 

  4. RECONFIRM DTC 
    1. Clear the DTC (see DTC CHECK / CLEAR ).
    2. Start the engine.
    3. Drive the vehicle at the speed of 20 mph (32 km/h) or more for at least 60 seconds.
    4. Check that the same DTC is recorded (see DTC CHECK / CLEAR ).

      Result 

      RESULT CHART

      Display (DTC Output) Proceed To
      DTCs (C0210/33 and C0215/34) are not output A
      DTCs (C0200/31 and C0205/32) are output B

      HINT:

      • It is suspected that the DTCs were output due to a bad connection of the connector terminal.
      • If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step (see PROBLEM SYMPTOMS TABLE ).

    B:  Go to step  11

    A: END 

  5. INSPECT REAR SPEED SENSOR INSTALLATION 
    1. Check the sensor installation.

      OK: 

      There is no clearance between the sensor and rear axle carrier. 

      The installation bolt is tightened properly. 

      Torque: 

      8.5 N*m (87 kgf*cm, 75 in.*lbf) 

      NOTE: Check the speed sensor signal after replacement (see TEST MODE PROCEDURE ).
    Fig 1: Checking Rear Speed Sensor Installation
    G05296916Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CHECK AND REPLACE REAR SPEED SENSOR 

    OK: Go to next step 

  6. INSPECT SPEED SENSOR TIP 
    1. Remove the rear speed sensor (see REAR SPEED SENSOR ).
    2. Check the sensor tip.

      OK: 

      No scratches or foreign matter on the sensor tip. 

      NOTE: Check the speed sensor signal after the cleaning or replacement (see TEST MODE PROCEDURE ).

    NG: CLEAN OR REPLACE REAR SPEED SENSOR 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE) 
    1. Disconnect the skid control sensor wire.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance: 

      RH 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Specified Condition
      n1 ("A"-2) - n1 ("B"-4) Below 1 Ω
      n1 (`A"-2) - n1 ("B"-5) 10 kΩ or higher
      n1 ("A"-2) - Body ground 10 kΩ or higher
      n1 ("A"-1) - n1 ("B"-5) Below 1 Ω
      n1 ("A"-1) - n1 ("B"-4) 10 kΩ or higher
      n1 ("A"-1) - Body ground 10 kΩ or higher

      LH 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Specified Condition
      o1 ("A"-2) - o1 ("B"-4) Below 1 Ω
      o1 ("A"-2) - o1 ("B"-5) 10 kΩ or higher
      o1 ("A"-2) - Body ground 10 kΩ or higher
      o1 ("A"-1) - o1 ("B"-5) Below 1 Ω
      o1 ("A"-1) - o1 ("B"-4) 10 kΩ or higher
      o1 ("A"-1) - Body ground 10 kΩ or higher
      NOTE: Check the speed sensor signal after replacement (see TEST MODE PROCEDURE ).
    Fig 2: Identifying Skid Control Sensor Wire Connector Terminals
    G05296917Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SKID CONTROL SENSOR WIRE 

    OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU TO REAR SPEED SENSOR) 
    1. Disconnect the skid control ECU connector and the front speed sensor connector.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance: 

      RH 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Specified Condition
      A44-5 (RR+) - n1-2 (RR+) Below 1 Ω
      A44-19 (RR-) - n1-1 (RR-) Below 1 Ω

      LH 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Specified Condition
      A44-20 (RL+) - o1-2 (RL+) Below 1 Ω
      A44-6 (RL-) - o1-1 (RL-) Below 1 Ω
    3. Measure the resistance according to the value(s) in the table below.

      Resistance: 

      RH 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Specified Condition
      A44-5 (RR+) - Body ground 10 kΩ or higher
      A44-19 (RR-) - Body ground 10 kΩ or higher

      LH 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Specified Condition
      A44-20 (RL+) - Body ground 10 kΩ or higher
      A44-6 (RL-) - Body ground 10 kΩ or higher
    Fig 3: Identifying Skid Control ECU And Front Speed Sensor Connectors
    G05296918Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT) 

    OK: Go to next step 

  9. INSPECT REAR SPEED SENSOR (INPUT VOLTAGE) 
    1. Disconnect the speed sensor connector.
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Condition Specified Condition
      n1-2 (RR+) - Body ground Engine switch on (IG) 7.5 to 12 V
      o1-2 (RL+) - Body ground Engine switch on (IG) 7.5 to 12 V
    Fig 4: Identifying Rear Speed Sensor Connector
    G05296919Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

    OK: Go to next step 

  10. RECONFIRM DTC 
    1. Clear the DTC (see DTC CHECK / CLEAR ).
    2. Start the engine.
    3. Drive the vehicle at the speed of 20 mph (32 km/h) or more for at least 60 seconds.
    4. Check that the same DTC is recorded (see DTC CHECK / CLEAR ).

      HINT:

      Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

    Result 

    RESULT CHART

    Display (DTC Output) Proceed To
    DTCs (C0210/33 and C0215/34) are not output A
    DTCs (C0210/33 and C0215/34) are output B

    HINT:

    If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step (see PROBLEM SYMPTOMS TABLE ).

    B: Go to step 11 

    A: END 

  11. REPLACE REAR SPEED SENSOR 
    1. Replace the rear speed sensor (see REAR SPEED SENSOR ).
      NOTE: Check the speed sensor signal after replacement (see TEST MODE PROCEDURE ).
  12. RECONFIRM DTC 
    1. Clear the DTC (see DTC CHECK / CLEAR ).
    2. Start the engine.
    3. Drive the vehicle at the speed of 20 mph (32 km/h) or more for at least 60 seconds.
    4. Check that the same DTC is recorded (see DTC CHECK / CLEAR ).

      HINT:

      Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

    Result 

    RESULT CHART

    Display (DTC Output) Proceed To
    DTCs (C0210/33 and C0215/34) are not output A
    DTCs (C0210/33 and C0215/34) are output B

    HINT:

    If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step (see PROBLEM SYMPTOMS TABLE ).

    B: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

    A: END 

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